如何使用Kotlin在Android中保存开关设置

val sharedPreferences = getSharedPreferences("MyPrefs", Context.MODE_PRIVATE)

val editor = sharedPreferences.edit()

editor.putBoolean("switch_key", switch.isChecked)

editor.apply()

val sharedPreferences = getSharedPreferences("MyPrefs", Context.MODE_PRIVATE)
val editor = sharedPreferences.edit()
editor.putBoolean("switch_key", switch.isChecked)
editor.apply()

class SwitchViewModel : ViewModel() {
    private val switchState = MutableLiveData<Boolean>()

    fun getSwitchState(): LiveData<Boolean> {
        return switchState
    }

    fun setSwitchState(state: Boolean) {
        switchState.value = state
    }
}

val switchViewModel: SwitchViewModel by viewModels()

switch.setOnCheckedChangeListener { _, isChecked ->
    switchViewModel.setSwitchState(isChecked)
}

switchViewModel.getSwitchState().observe(this, { state ->
    // 处理开关状态变化
})

class SwitchActivity : AppCompatActivity() {
    private val switchViewModel: SwitchViewModel by viewModels()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_switch)

        switch.setOnCheckedChangeListener { _, isChecked ->
            switchViewModel.setSwitchState(isChecked)
        }

        switchViewModel.getSwitchState().observe(this, { state ->
            // 处理开关状态变化
        })
    }
}